Title: Error when trying to index
Last modified: August 24, 2016
---
# Error when trying to index
* Resolved [trident60](https://wordpress.org/support/users/trident60/)
* (@trident60)
* [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/)
* Hello,
* I get the following errors when I try to index – I’m running Solr on Ubuntu with
Apache and Jetty, PHP, Mariadb.
* Thanks for your help!
* Error on attached file “htRwGlPNp2VvCkNRRleEY9i2-EkGYJcsYTdzSBsJ07-7PGq3HpxTwML1Xgi89oWjKykw300.
png”:
Solr HTTP error: OK (500) {“error”:{“msg”:”lazy loading error”,”trace”:”
org.apache.solr.common.SolrException: lazy loading error\n\tat org.apache.solr.
core.RequestHandlers$LazyRequestHandlerWrapper.getWrappedHandler(RequestHandlers.
java:257)\n\tat org.apache.solr.core.RequestHandlers$LazyRequestHandlerWrapper.
handleRequest(RequestHandlers.java:239)\n\tat org.apache.solr.core.SolrCore.execute(
SolrCore.java:1916)\n\tat org.apache.solr.servlet.SolrDispatchFilter.execute(
SolrDispatchFilter.java:768)\n\tat org.apache.solr.servlet.SolrDispatchFilter.
doFilter(SolrDispatchFilter.java:415)\n\tat org.apache.solr.servlet.SolrDispatchFilter.
doFilter(SolrDispatchFilter.java:205)\n\tat org.eclipse.jetty.servlet.ServletHandler
$CachedChain.doFilter(ServletHandler.java:1419)\n\tat org.eclipse.jetty.servlet.
ServletHandler.doHandle(ServletHandler.java:455)\n\tat org.eclipse.jetty.server.
handler.ScopedHandler.handle(ScopedHandler.java:137)\n\tat org.eclipse.jetty.
security.SecurityHandler.handle(SecurityHandler.java:557)\n\tat org.eclipse.jetty.
server.session.SessionHandler.doHandle(SessionHandler.java:231)\n\tat org.eclipse.
jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)\n\tat
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)\n\tat
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)\
n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.
java:1009)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.
java:135)\n\tat org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(
ContextHandlerCollection.java:255)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.
handle(HandlerCollection.java:154)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.
handle(HandlerWrapper.java:116)\n\tat org.eclipse.jetty.server.Server.handle(
Server.java:368)\n\tat org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(
AbstractHttpConnection.java:489)\n\tat org.eclipse.jetty.server.BlockingHttpConnection.
handleRequest(BlockingHttpConnection.java:53)\n\tat org.eclipse.jetty.server.
AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:942)\n\tat
org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(
AbstractHttpConnection.java:1004)\n\tat org.eclipse.jetty.http.HttpParser.parseNext(
HttpParser.java:647)\n\tat org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.
java:235)\n\tat org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.
java:72)\n\tat org.eclipse.jetty.server.bio.SocketConnector$ConnectorEndPoint.
run(SocketConnector.java:264)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.
runJob(QueuedThreadPool.java:608)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool
$3.run(QueuedThreadPool.java:543)\n\tat java.lang.Thread.run(Thread.java:745)\
nCaused by: org.apache.solr.common.SolrException: Error loading class ‘solr.extraction.
ExtractingRequestHandler’\n\tat org.apache.solr.core.SolrResourceLoader.findClass(
SolrResourceLoader.java:470)\n\tat org.apache.solr.core.SolrResourceLoader.findClass(
SolrResourceLoader.java:401)\n\tat org.apache.solr.core.SolrCore.createInstance(
SolrCore.java:531)\n\tat org.apache.solr.core.SolrCore.createRequestHandler(SolrCore.
java:604)\n\tat org.apache.solr.core.RequestHandlers$LazyRequestHandlerWrapper.
getWrappedHandler(RequestHandlers.java:248)\n\t… 30 more\nCaused by: java.lang.
ClassNotFoundException: solr.extraction.ExtractingRequestHandler\n\tat java.net.
URLClassLoader$1.run(URLClassLoader.java:366)\n\tat java.net.URLClassLoader$1.
run(URLClassLoader.java:355)\n\tat java.security.AccessController.doPrivileged(
Native Method)\n\tat java.net.URLClassLoader.findClass(URLClassLoader.java:354)\
n\tat java.lang.ClassLoader.loadClass(ClassLoader.java:425)\n\tat java.net.FactoryURLClassLoader.
loadClass(URLClassLoader.java:789)\n\tat java.lang.ClassLoader.loadClass(ClassLoader.
java:358)\n\tat java.lang.Class.forName0(Native Method)\n\tat java.lang.Class.
forName(Class.java:274)\n\tat org.apache.solr.core.SolrResourceLoader.findClass(
SolrResourceLoader.java:454)\n\t… 34 more\n”,”code”:500}}
* [https://wordpress.org/plugins/wpsolr-search-engine/](https://wordpress.org/plugins/wpsolr-search-engine/)
Viewing 6 replies - 1 through 6 (of 6 total)
* Plugin Author [WPSOLR](https://wordpress.org/support/users/wpsolr/)
* (@wpsolr)
* [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/#post-6098131)
* It’s usually an install issue with Solr, where the extract plugin classes are
missing.
* Check here for instance:
[http://stackoverflow.com/questions/27058991/solr-tomcat-org-apache-solr-common-solrexception-lazy-loading-error](http://stackoverflow.com/questions/27058991/solr-tomcat-org-apache-solr-common-solrexception-lazy-loading-error)
* Thread Starter [trident60](https://wordpress.org/support/users/trident60/)
* (@trident60)
* [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/#post-6098258)
* After re-installing a few times 😉 I got the error down to a single line and
I can’t troubleshoot the problem further on my own….here’s the error when I try
to index:
* ```
Solr HTTP error: OK (400) {"responseHeader":{"status":400,"QTime":6},"error":{"msg":"ERROR: [doc=1] unknown field 'PID'","code":400}}
```
* Based on some past questions I came across it seems to be a problem with the
solrconfig.xml? I’ve tried both – the original and the one from WPSolr’s site.
* Thanks for your help!
* Plugin Author [WPSOLR](https://wordpress.org/support/users/wpsolr/)
* (@wpsolr)
* [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/#post-6098262)
* Please try this:
[https://wordpress.org/support/topic/error-loading-data-to-index?replies=6](https://wordpress.org/support/topic/error-loading-data-to-index?replies=6)
* Lucene’s version in solrcongig.xml should match your actual install’s
* If you have Solr 5.0 (5.1 does not work with WPSOLR), use files for 5.0 delivered
by WPSOLR.
* Thread Starter [trident60](https://wordpress.org/support/users/trident60/)
* (@trident60)
* [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/#post-6098267)
* Hello,
I removed 5.1 and installed 5.0.
* And now I get a different error.
* ```
We could not join your Solr server. Your Solr path could be malformed, or your Solr server down (Solr code 404)
Solr HTTP error: OK (404) Error 404 Not Found HTTP ERROR: 404
Problem accessing /opt/admin/ping. Reason:
Not Found
Powered by Jetty:// 0
```
* I tried the above post you mentioned – I tried with the .xml files from your
site and the original files. I tried with your schema and the original solrconfig
and vice versa.
* The path on my server is:
* /opt/solr/server/hitlink/data/index
* I’ve tried ever variation of that path:
/opt /opt/solr /opt/solr/server….etc…
* Any other suggestions? 🙂
* Thanks!
* Thread Starter [trident60](https://wordpress.org/support/users/trident60/)
* (@trident60)
* [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/#post-6098268)
* One other thing – the error is saying :problem accessing /solr/admin/ping. Reason:
Not Found”
* I don’t have a admin/ping, or even just “admin”, anywhere in my installation.
* Thread Starter [trident60](https://wordpress.org/support/users/trident60/)
* (@trident60)
* [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/#post-6098271)
* Okay – got it working! I had the wrong path….
* I didn’t have to put in the entire path:
* /opt/solr/server/solr/hitlink
* It ended up being:
* /solr/hitlink
* Thanks!
Viewing 6 replies - 1 through 6 (of 6 total)
The topic ‘Error when trying to index’ is closed to new replies.
* 
* [WPSOLR - Elasticsearch and Solr search](https://wordpress.org/plugins/wpsolr-search-engine/)
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## Tags
* [index](https://wordpress.org/support/topic-tag/index/)
* [solr](https://wordpress.org/support/topic-tag/solr/)
* 6 replies
* 2 participants
* Last reply from: [trident60](https://wordpress.org/support/users/trident60/)
* Last activity: [11 years, 2 months ago](https://wordpress.org/support/topic/error-when-trying-to-index/#post-6098271)
* Status: resolved